From 1bfb545d33d0306784efc769b9abb8c93e638cdc Mon Sep 17 00:00:00 2001
From: campbeb <bpcampbell@gmail.com>
Date: Sat, 15 Oct 2016 16:41:25 -0400
Subject: [PATCH] Hide background UWP apps from window capture options

UWP apps that aren't shown are 'cloaked'
---
 ShareX.HelpersLib/Native/NativeEnums.cs           | 3 +++
 ShareX.HelpersLib/Native/NativeMethods.cs         | 3 +++
 ShareX.HelpersLib/Native/NativeMethods_Helpers.cs | 7 +++++++
 ShareX.HelpersLib/Native/WindowInfo.cs            | 4 +++-
 4 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/ShareX.HelpersLib/Native/NativeEnums.cs b/ShareX.HelpersLib/Native/NativeEnums.cs
index 7b55f3251..365b1109b 100644
--- a/ShareX.HelpersLib/Native/NativeEnums.cs
+++ b/ShareX.HelpersLib/Native/NativeEnums.cs
@@ -207,6 +207,9 @@ public enum DwmWindowAttribute
         HasIconicBitmap,
         DisallowPeek,
         ExcludedFromPeek,
+        Cloak,
+        Cloaked,
+        FreezeRepresentation,
         Last
     }
 
diff --git a/ShareX.HelpersLib/Native/NativeMethods.cs b/ShareX.HelpersLib/Native/NativeMethods.cs
index efd9edb7e..6666ac21d 100644
--- a/ShareX.HelpersLib/Native/NativeMethods.cs
+++ b/ShareX.HelpersLib/Native/NativeMethods.cs
@@ -392,6 +392,9 @@ public static partial class NativeMethods
         [DllImport("dwmapi.dll")]
         public static extern int DwmGetWindowAttribute(IntPtr hwnd, int dwAttribute, out bool pvAttribute, int cbAttribute);
 
+        [DllImport("dwmapi.dll")]
+        public static extern int DwmGetWindowAttribute(IntPtr hwnd, int dwAttribute, out int pvAttribute, int cbAttribute);
+
         [DllImport("dwmapi.dll")]
         public static extern void DwmEnableBlurBehindWindow(IntPtr hwnd, ref DWM_BLURBEHIND blurBehind);
 
diff --git a/ShareX.HelpersLib/Native/NativeMethods_Helpers.cs b/ShareX.HelpersLib/Native/NativeMethods_Helpers.cs
index 779eff689..a2f1f996e 100644
--- a/ShareX.HelpersLib/Native/NativeMethods_Helpers.cs
+++ b/ShareX.HelpersLib/Native/NativeMethods_Helpers.cs
@@ -349,6 +349,13 @@ public static bool IsWindowMaximized(IntPtr handle)
             return wp.showCmd == WindowShowStyle.Maximize;
         }
 
+        public static bool IsWindowCloaked(IntPtr handle)
+        {
+            int cloaked;
+            int result = DwmGetWindowAttribute(handle, (int)DwmWindowAttribute.Cloaked, out cloaked, sizeof(int));
+            return result == 0 && cloaked != 0;
+        }
+
         public static IntPtr SetHook(int hookType, HookProc hookProc)
         {
             using (Process currentProcess = Process.GetCurrentProcess())
diff --git a/ShareX.HelpersLib/Native/WindowInfo.cs b/ShareX.HelpersLib/Native/WindowInfo.cs
index 36d02742f..a13bf6879 100644
--- a/ShareX.HelpersLib/Native/WindowInfo.cs
+++ b/ShareX.HelpersLib/Native/WindowInfo.cs
@@ -54,7 +54,9 @@ public class WindowInfo
 
         public bool IsMinimized => NativeMethods.IsIconic(Handle);
 
-        public bool IsVisible => NativeMethods.IsWindowVisible(Handle);
+        public bool IsVisible => NativeMethods.IsWindowVisible(Handle) && !IsCloaked;
+
+        public bool IsCloaked => NativeMethods.IsWindowCloaked(Handle);
 
         public bool IsActive => NativeMethods.GetForegroundWindow() == Handle;